Sewing-machine.



J. KIEWIGZ.

SEWING MACHINE.

APPLICATION FILED JULY 24,1911. 1,020,041. I Patented Mar. 12, 1912.

3 SHEETS-BEBE?! 1- um'i'n' H J. KIEWIGZ. SEWING MACHINE-fAPPLIOATIOIPILED JULY 24,1911.

Patented Mar. 12, 1912.

3 SHEETS-SHEET 2.

J. KIEWICZ.

snwma MACHINE.

APPLICATION FILED JULY 24,1911 1,020,041 Patented Mar. 12,-1912.

3 SHEETS-SHEET 3.

JOHN KIEWICZ, 0F HYDE PARK, MASSACHUSETTS.

SEWING-MACHINE.

Specification of Letters Patent.

Application filed July 24, 1911. Serial No. 640,070.

To all whom it may concern:

Be it known that I, JOHN KIEWICZ, a citizen of the United States,residing at Hyde Park, 'county of Norfolk, State of Massachusetts, haveinvented an Improvement in Sewing-Machines, of; which the followingdescription, in connection withthe accompanying drawing, is aspecification, like characters on the drawing representing-like parts. vI

This invention relates to lock stitch sewing machines of that type whichemploy a stationary shuttle, and the general ob ect of the invention isto provide a sewing machine of this type which has a comparativelysimple construction and which can be run noise 'lessly and ate highspeed.

The features wherein my inventionresides will be fully hereinafterdescribed and then pointed out in the appended claims.

My invention may be applied to almost any type of sewing machineadaptedto make the lock stitch, and as illustrating one application thereof Ihave shown it as it would be applied to a buttonhole sewing machine ofthe general type shown in Patents No. 714,284, dated November 25, 1902,and No. 749,776, dated January 19, 1904. I wish it understood, however,that my invention is not limited in its application to buttonholesewingmachines of this type, but can be easily embodied in almost anytype of sew ing machine.

. Referring to the drawings wherein I have illustrated one/embodiment ofmy invention, Figure 1 is a side viewof a portion of the bed of a sewingmachine as shown in said before-mentioned Patents N o.- 714,284 and No.'749,776, with a part of the bed broken out to show the construction;Fig. 2 is a top plan view of the shuttle; Fig. 3 is a vertical sectionalview through the shuttle and looper-carrying shaft; Figs. 4 and 5 areside views of the shuttle showing different positions of the looper;Fig. 6 is a sectional view through the shuttle on substantially theliner-w, Fig. 2; Fig. 7 is a horizontal sectional view through theshuttle on the line y y, Fig. 6; Fig. 8 is a plan view of the shuttle,looper and operating mechanism; Figs. 9, 10 and 11 are plan views of theshuttle and looper showing different positions of' the parts in theformation of the stitch; Fig. 12 is a'view showingthe looper-operatingmechanism- Fig. 1315; a plan view of the stationary shuttle support;

'Fig. 14 is a plan view of the hold-down; Flg. 15 is a perspective viewof the looper;

Figs. 16, 17 and 18 are views showing the manner in which the loop istaken from the needle and carried around the shuttle; Fig. 19 is a sideview of the shuttle and holddown; Fig. 20 is a perspective view of theshuttle support.

In the sewing machine herein illustrated A represents a portion of theframe of the sewing machine and A the bed of a sewing machine, such asillustrated in said abovementioned patents. Situated above the bed isthe usual overhanging arm, a portion of which is shown at l and whichsupports the needle 2 that is adapted to reciprocate in a verticaldirection. The needle herein shown is an eye-pointed needle through theeye of which the upper or needle thread 3 passes in usual manner. Saidneedle reciprocates through an aperture in the throat-plate 4 carried bythe bed plate A as usual in machines of this description.

The shuttle of the sewing machine is shown at 40 and it is a stationaryshuttle situated beneath the throat plate and in position so that theneedle reciprocates at one side. This shuttle is an open-topped shellprovided with a central hollow stud 6 on which the bobbin 5 is supportedin usual manner. On the interior wall of the shuttle is a tension plate7 provided .with an aperture 8 through which the thread passes from thebobbin to an aperture 9 in the shuttle. Said tension plate is a springplate yieldingly held against the inner wall of the shuttle and bearsagainst the shuttle thread, as will be obvious.

The shuttle 40 is sustained on a stationary support or platform 9 whichis centered and held in the proper position by the shaft 10 that carriesthe looper 11. This shaft 10 is mounted for turning movement in abearing 12 carried by a bracket-13 fastened to the underside of the bedplate A and it has at its lower end a pinion 14 that meshes with and isdriven by a segmental rack 15 carried on a swinging arm 16. Said arm isFast to the upper end of the shaft 10 is a looper-carrying arm 19 whichcarries the looper 1l,said looper being arranged to turn Patented Mar.12', 1912 about the exterior of the periphery thereof. The

hold the shuttle support in its proper pos1- tion. The shuttle 40 restsloosely on the stalli tionary shuttle support 9 and is secured in placepartly by a hold-down 24 and partly by a'positioning finger 25. Thehold-down is shown in Fig. 14 and is in the form of aplate which isfastened at one end to'the bed of the machine, as at 26, and is providedwitha point 27 that overlies one edge of the shuttle and with afinger 28that not only overlies the upper edge of the shuttle but enters theshuttle slightly, as clearly seen i in Fig. 3. The upper edge of theshuttle is provided with a shoulder 29 adjacent the point 27, whichshoulder coiiperates with the point 27 to prevent turning movement ofthe shuttle clockwise in Figs. .9 and 10.

The positioning finger 25 is fastened to the 7 bed of the machine in anysuitable way, as

by a screw 30, and it is adapted to cooperate with another shoulder 31formed on the top ed e of the shuttle as shown in Figs. 4 and ing in theopposite direction.

shoulders 27 and finger 25 prevent the shuttle from turning in eitherdirection and the'holdv 40 down 24 prevents the shuttle from rising andfrom lateral movement while permitting it to be. readily removed fromthe support by tipping up the edge of the shuttle opposite thehold-down. The shuttle support 9 is also provided with the lip or flange32 which assists in positioning the shuttle. The shuttle support 9 isheld-from rotary movement by means associated with the hold,- down. Asherein shown said shuttle support is provided with the vertical flange33 having an apertured car '34 extended therefrom and a pin 35'depending from the hold-down enters the aperture in the ear and thusholds the shuttle support from rotation.

In the operation of the device the needle is depressed through thethroatplate, as seen in Fig, 1,.and at this time the looper is situatedback of the needle, as shown in Fig. 9. As the needle begins itsretracting move ment a slight loop or slackness. is formed in the needlethread'3 and the looper is at this time swung forwardly into theposition.

shown in Fig. 10 so that the nose thereof will pass in behind the needleand enter the loop 49 of the needle thread. It is underhereby to preventthe shuttle from turn-' 29 and 31, together witlith point stood, ofcourse, that when the needle is in its lowest position the point of theneedle stands above the arm 19 so that the looper can swing around theneedle without coming in contact therewith. As the needle is retractedthe looper continues its forward swinging movement into the dottedlineposition Fig. 10, during which movement it draws on and enlarges theloop 49 of needle thread and carries said loop around the shuttle, asseen in Fig. 4. The shuttle is provided on its side with a loop-openingprojection or portion 41 whichis shown as a wedge-shaped portion havingthe two-converging shoulders or walls 42. As the looper is moved aboutthe shuttle from the full to the dotted line position shown in Fig. 10or from the position shown in Fig. 4 to the position shown in Fig. 5,the point .43 of the loop-opening portion enters the loop 49 and the twosides of the loop move down over the inclined shoulders 42 and thus saidloop-opening projection 41 insures that the loop will be opened properlyto receive the shuttle. In fact the upper and lower branches of the loopnaturally slide over the top and bottom of the shuttle so that when theloop has been carried around into the position shown in Fig. 11 it iscarried entirely over the shuttle. When the looper reaches the positionshown in Fig. 11 the usual take-up (not shown) operates tot-ake up theneedle thread, during which operation the loop is shed from the looperand the latter begins its backward movement into initial position again.The take-up operates to set the stitch in usual manner, the tensionplate 7 supplying therequisite tension to the shuttle thread. As'theneedle makes its next descent the take-up gives up thread as usual. insewing machines of this type for the formation of the next stitch.During the operation of the device the loop passes between the shuttleandthe stationary -shuttle support 9 and also between the shuttle andthe hold-down, it being understood that sufficient space is providedbetween these parts to readily permit the loop to pass over the shuttle.Itv will be seen from the. above that my invention is comparativelysimple and comprises few parts and because of this fact the, sewingmachine. can be run at a comparatively high speed. i

Having fully described my invention, what I claim as new and desire tosecure by Letters Patent ,is:- i 1. In a sewing machine,thecombinationwith. a looper-carrying shaft, of, a horizontal shuttle supportsustained by the shaft,

means for holding said support stationary,

a stationary shuttle resting on; the support and provided with ashoulder on its upper edge, a horizontal finger to engage said shoulder,and prevent the shuttle from turning, a needle, and a looper carried bythe shaft and moved thereby in a path exterior to the shuttle and inaplane at right angles to the needle path.

2. In'a sewing machine, the combination with a needle, of a stationaryshuttle sup port, a stationary shuttle sustained on said a, support andprovided on its upper edge with a shoulder, a looper, means to move thelooper about the shuttle in a circular path thereby to carry a loop ofneedle thread around the shuttle, a hold-down for the shuttle to preventit from rising and also to hold it from turning in one direction, and afinger engaging the shoulder'of the shuttle and preventing it fromturning in the other direction.

3. In a sewing machine, the combination with a stationary shuttle-havingtwo oppositely-disposed shoulders on its upper edge,

of means for supporting the shuttle, a

needle, a looper, means to move the looper in a circular path exteriorlyto the shuttle thereby to carry a loop of needle thread threabout, ahold-down to engage the upper edge of the shuttle and coiiperating withone of said shoulders to prevent turning movement of the shuttle 1n onedirection, and a finger coiiperating with the other shoulder toprevent'turning movement of the shuttle in the other direction.

4. In a'sewing machine, the combination with a vertically-arranged shafthaving an axial recess, a looper sustained by said shaft,

a stationary platform provided with a stud "entering said recess anpositioned thereby, a shuttle on the platform and provided with ashoulder, a stationary hold-down to engage the top of the shuttle andprevent it 40 from rising and to engage said shoulder to prevent theshuttle from turnin and a needle, said looper operating to ta lie a loopof needle thread and carry it around the shuttle.

5. In a'sewing machine, the combination with a needle, of a horizontalstationary platform adjacent the path of the needle, a stationaryshuttle supported by the platform and provided with a shoulder, a hold-5 down engaging the top of the shuttle to hold the latter from risingand cooperating with said shoulder to hold said shuttle from turning,and a looper to take a loop of needle thread and carry it around theshuttle.

- 6. In a sewing machine, the combination with a needle, of a stationaryplatform adjacent the path of'the needle, a stationary shuttle supportedby the platform, a stationary hold-down engaging the top of the shuttleto hold the latter in position, a looper to take a loop of needle threadand carry it around the shuttle, said platform having a flange risingtherefrom, and means connecting said flange to the hold-down thereby toprevent the platform from turn- 1ng.

7. In a sewing machine, the combination with a needle, of a shaft havingan axial recess, a platform having a stud entering said recess andpositioned thereby, a stationary shuttle on said platform, aholddown forthe shuttle provided with means to prevent said shuttle from turning,and a looper carried by said shaft and adapted to take a loop of needlethread and pass it around the shuttle.

8. In a sewing machine, the combination with a needle, of a shaft havingan axial recess, a platform having a stud entering said recess andpositioned thereby, a stationary shuttle on said platform, a holddownfor the shuttle, said platform having a flange rising therefrom, meansconnecting said flange to the hold-down thereby to prevent the platformfrom turning, and a looper carried by said shaft and adapted to take aloop of needle thread and pass it around the shuttle.

9. In a sewing machine, the combination with a stationary shuttle, of aneedle, a

looper to take a loop of needle thread and carry it around the shuttle,said shuttle havinga shoulder on its upper edge, and a hold-downprovided with a point overlying said upper edge of the shuttle adjacentthe shoulder and also provided with a downturned finger to overlie andenter the shuttle.

10. In a sewing machine, the combination with a stationary shuttle, of aneedle, a looper to take a loop of needle thread and carry it around theshuttle, and a holddown to engage the top of the shuttle and prevent thelatter from rising, said holddown being provided with a down-turnedfinger to enter the shuttle and prevent lateral movement thereof.

In testimonywhereof, I have signed my name to this specification, in thepresence of two subscribing witnesses.

JOHN KIEWICZ. Witnesses:

THOMAS J. CARTY, JOHN 0. Burns.

